Question

我正在开发自定义电子商务解决方案。我要指出的是，我无法获得具有其属性和属性值（按名称分组）的产品。例如，用户位于category_01中，这里有5个产品。我想向他显示可用值的属性过滤器。但是只有这5个产品的属性和值。我可以获取分组的属性标题，但是我不知道如何获取分组的属性值。

CREATE TABLE `shop_products` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`status` tinyint(1) unsigned NOT NULL DEFAULT '1',
`title` varchar(255) COLLATE utf8_unicode_ci,
`sku` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
`price` double(10,4) unsigned NOT NULL,
PRIMARY KEY (`id`)
)

CREATE TABLE `shop_products_properties` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`product_id` int(10) unsigned NOT NULL,
`title` varchar(255) COLLATE utf8_unicode_ci,
`deleted` tinyint(1) unsigned DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `product_id_foreign` (`product_id`),
CONSTRAINT `product_id_foreign` FOREIGN KEY (`product_id`) 
REFERENCES `shop_products` (`id`) ON DELETE CASCADE
)

CREATE TABLE `shop_products_properties_values` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`property_id` int(10) unsigned NOT NULL,
`value` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`deleted` tinyint(1) unsigned DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `values_property_id_foreign` (`property_id`),
CONSTRAINT `values_property_id_foreign` FOREIGN KEY (`property_id`) 
REFERENCES `shop_products_properties` (`id`) ON DELETE CASCADE
)

我正在使用Laravel，因此我获得了具有hasMany属性和hasMany值的过滤产品。效果很好，但现在我需要按标题对属性进行分组，并按值对属性值进行分组。

示例：

1.Product
shop_products: T-shirt
shop_products_properties: Color, Size, Material
shop_products_properties_values: Black, Red, White, XS, S, M, Cotton

2.Product
shop_products: Hoodie
shop_products_properties: Color, Size
shop_products_properties_values: Red, Green, White, M, L, XL

我需要得到如下结果：

Colors: Black, Red, White, Green, White
Sizes: XS, S, M, L, XL
Materials: Cotton

我不知道是否有可能创建mysql查询以获得此结果，还是我应该过滤和自定义集合...我将不胜感激

Answer 1

假设我已经正确解释了您的数据结构，那么该查询将满足您的要求。

SELECT p.title, GROUP_CONCAT(DISTINCT v.value ORDER BY v.value) AS `values`
FROM shop_products_properties p
LEFT JOIN shop_products_properties_values v
ON v.property_id=p.id
GROUP BY p.title

输出：

title       values
Color       Black,Green,Red,White
Material    Cotton
Size        L,M,S,XL,XS

Demo on rextester

MySQL选择具有属性和属性值的产品-分组

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